package demo2;

public interface IUSB {
    public static final String SIZE = "small";
    public abstract void openDevice();
    void closeDevice();
    public static void test() {
        System.out.println("调用静态方法test()");
    }
    public default void test1() {
        System.out.println("调用default修饰的test1()");
    }
}
